C / C++ / MFC

DWORD CALLBACK _LoadRtfCallback(
DWORD dwCookie, // (in) pointer to the string
LPBYTE pbBuff, // (in) pointer to the destination buffer
LONG cb, // (in) size in bytes of the destination buffer
LONG FAR *pcb // (out) number of bytes transfered
)

void CRichEgView::OnReadin() 
{
	CString sWriteText; //Where the text will be streamed from
	sWriteText="Rich text is shown here in sample project";

	// This is hard-coded for example purposes. It is likely this would
	// be read from file or another source.
	EDITSTREAM es;
	es.dwCookie = (DWORD)&sWriteText; // Pass a pointer to the CString to the callback function
	es.pfnCallback = MEditStreamInCallback; // Specify the pointer to the callback function

	GetRichEditCtrl().StreamIn(SF_RTF,es); // Perform the streaming
}

void CTrain1View::OnReadin() 
{
	CString sWriteText; //Where the text will be streamed from
	sWriteText="Rich text is shown here in sample project";

	// This is hard-coded for example purposes. It is likely this would
	// be read from file or another source.
	EDITSTREAM es;
	es.dwCookie = (DWORD)&sWriteText; // Pass a pointer to the CString to the callback function
	es.pfnCallback = _LoadRtfCallback; // Specify the pointer to the callback function

	m_richedit.StreamIn(SF_RTF,es); // Perform the streaming
}

DWORD CALLBACK _LoadRtfCallback(
   DWORD dwCookie,      // (in) pointer to the string
   LPBYTE pbBuff,       // (in) pointer to the destination buffer
   LONG cb,             // (in) size in bytes of the destination buffer
   LONG FAR *pcb        // (out) number of bytes transfered
   )
{
   LPCTSTR pszMsg = (LPCTSTR)dwCookie;

   // number of bytes to copy
   *pcb = _tcslen( pszMsg ) * sizeof(TCHAR);

   // limiting it up to the buffer's size
   if( *pcb > cb )
      *pcb = cb;

   // copying the string to the buffer
   memcpy( pbBuff, pszMsg, *pcb );

   // advancing to the end of the string
   pszMsg += *pcb / sizeof(TCHAR);

   // if it's the end of the string, returns NULL;
   // otherwise, returns a pointer to the next char to transfer as the cookie
   return ( *pszMsg != '\0' ) ? (DWORD)pszMsg : NULL;
}

Shog⁹ 
--

Maybe Java is kind of like God, it "works in mysterious ways". It seems like your apps are running slowly, because in the backgroud Java is solving world hunger, or finding the cure to cancer.
- Ryan Johnston, Don't die java!